52 



I 102.8 TOMKOK CREEK ( Iliainm Lake) 



LOCATION: 59%7'^2" N. 13k°21'h8" W. 



PREVIOUS NAMES OR NUMBERS: Fk 



U.S.G.S. MAP: Iliarana, 1:250,000 



PHYSICAL DESCRIPTION 



TOTAL LENGTH: 16.5 miles 



LENGTH ACCESSIBLE TO SALMON: I6.5 miles 



AVERAGE WIDTH: 20' RANGE: 15 '-35' 



AVERAGE DEPTH: 12" RANGE: 10 "-24" 



TOTAL ACCESSIBLE SPAWNING AREA: 193, 60O square yards (IiO.O acres) 



POTENTIAL SPAWNING AREA: 35^, 67,760 square yards (l4.0 acres) 



BOTTOM QUALITY: 33/0 <l/8", 26fo l/8"-3", 28^ 3"-12", 11/. >12". Lower 2 



miles good spawning gravel interspersed with rocky areas, upper portion 

 poor due to rubtle and boiolders. Bottom fairly stable. 



WATERSHED: ^k square miles. Upper part a glacial valley, lower h miles a 

 broad flat heavily forested with spruce, cottonwood, and birch. Tomkok 

 and Cayon Creeks directly connected 3 miles above mouth of Tomkok Creek. 

 Source: a small lake, some springs in lower 2 miles. 



GRADIENT: 55 '/mile 



WATER VELOCITY: 2.0 fps 



FLOW: kO cfs (Sept. 7, I962) . Measvired RANGE: 

 300 yds above confluence with Canyon 

 Creek, normal summer flow. 



AIR TEMPERATURE: l8.0° C. (Sept. 7, I962) 



WATER TEMPERATURE: 8.8° C. (Sept. 7, I962) 



POOLS AND RIFFLES: 



